diff --git a/app/assets/javascripts/discourse/lib/utilities.js.es6 b/app/assets/javascripts/discourse/lib/utilities.js.es6
index 15976a4be82..c79d47591e2 100644
--- a/app/assets/javascripts/discourse/lib/utilities.js.es6
+++ b/app/assets/javascripts/discourse/lib/utilities.js.es6
@@ -428,7 +428,7 @@ export function clipboardData(e) {
 
   let types = clipboard.types;
 
-  if (typeof types !== "array") {
+  if (!Array.isArray(types)) {
     types = Array.from(types);
   }